The obvious answer would be to have it serviced by a company that services carillons and carillon equipment. Sometimes you get what you pay for. However, if you're looking for a "do-it-yourself" solution, some of us may have some suggestions (most of them admittedly amateur solutions). There is much that we don't know here. Who built the practice console? When was it built? How are the bars held in place?

Can you post some photos to a web page and link to them here? (You cannot, so far as I know, post photos directly to the forum.)

Dan, Do you have a Smartphone? I am going to try uploading a photo from my Smartphone to this post.I will send it as Medium Size, which is about 150 KB.If this works, then you could photograph your instrument using a Smartphone.Then e-mail it to yourself as Medium Size. Open your e-mail and save the photo to your camera roll. Upload it from there. You can post up to 3 photos per posting, but you do have to shrink them first as I have indicated. Then let the expert members see what you are up against. If this fails, then John, please delete my post.

Thanks so much, Frances, for your post. Unfortunately I am a Luddite who makes do with a very stupid phone. The picture you post, however, looks exactly like our instrument. I realize that people are not likely to be able to tell much without being able to examine the beast itself, but I thought it would be worth a shot to see if anyone had faced and surmounted a similar problem. Thanks again for taking the time.

The bars rest on felt pads and float freely. I have been all over the instrument and cannot see anything that might impinge on their ability to vibrate. There is nothing at either end of the bars that gets in the way. And I have experimented with the mallets to make sure they do not strike the bar and then hold it in place.

I must be missing something, for most of the worst affected are the lower (base) sharps/flats that are all in a line on the same level. The respective naturals (on a lower level) all ring clearly.